How can it be that films in 1000 fps are slow-motion but when you play a game and the fps varies from lets say 60-250 it doesn’t get “slower” the closer you get to the 250?

Question

Because you would then assume that higher fps = slowmotion / slower image

In: 0

Answer 1

The slow motion effect comes from recording things in a different fps rate than you play it back.

If you record a video at 60fps and play it back at 30fps without leaving any frames out, it runs at half the speed. Everything will appear to move half as fast as it really did. a minute long video will take two minutes to play that way.

If you record a video at 60fps and play it back at one tenth of the original speed you end up only displaying 6 frames per second.

To the human eye that no longer looks like a smooth motion but just as a series of still images.

if you play a 60fps video at one sixtieth of the original speed you only have a single frame every second left. It looks ugly, like on of those ancient security cameras that only takes a single picture each second.

To be able to play a video back in really slow motion and still have it look good, you need to record it with enough fps that you can slow it down and still have enough fps left to see a good quality video.

You can play back a 1000 fps video at 1/20th of the original speed and still have a comfortable 50 fps video.

This is why cameras designed for slow motion video capture record at extreme fps rates that wouldn’t really be of any use if played back at normal speeds.